Is it normal to wake up with an erection?

Yes! During puberty, those with penises may notice that they wake up with an erection. This is something that is totally normal and will likely last (at least intermittently) throughout your life. In fact, you are likely getting many erections throughout the night and you don’t even know it. This is because nocturnal (nighttime) erections only happen during one specific phase of sleep (REM or the Rapid Eye Movement phase). This is also the reason why you may, at some point in your life, not notice erections when you wake up. This can happen if you are not sleeping well or otherwise suffer from a medical condition that disrupts your normal sleep cycle (like depression).